公开(公告)号：US20150022677A1

公开(公告)日：2015-01-22

申请号：US13943145

申请日：2013-07-16

Applicant: QUALCOMM Incorporated

Inventor： Kai Guo ,  Shu Xiao ,  Prasanjit Panda

IPC: H04N5/232

CPC classification number: H04N5/23267 ,  H04N5/23254 ,  H04N5/23274

Abstract: Described herein are methods, systems, and apparatus to process video images to remove jitteriness due to hand shake. In one aspect, a camera is configured to capture raw video composed of a series of successive image frames of a scene of interest. A processor is configured to receive the image frames, estimate a global camera motion from successive frames, stabilize the camera motion by establishing an upper bound and a lower bound of the global camera motion and smoothing the curve of camera motion between the upper and lower bounds, and upsample the resulting stabilized video frames to produce a smooth video.

Abstract translation: 这里描述了处理视频图像以消除由于手抖动引起的抖动的方法，系统和装置。 在一个方面，相机被配置为捕获由感兴趣的场景的一系列连续图像帧组成的原始视频。 处理器被配置为接收图像帧，从连续帧估计全局摄像机运动，通过建立全局摄像机运动的上限和下限来平稳摄像机运动，并平滑上下两帧之间的摄像机运动曲线 ，并对所得到的稳定视频帧进行上采样以产生平滑的视频。

公开(公告)号：US09247448B2

公开(公告)日：2016-01-26

申请号：US13974906

申请日：2013-08-23

Applicant: QUALCOMM Incorporated

Inventor： Rahul Gopalan ,  Hyukjune Chung ,  Prasanjit Panda

IPC: H04W28/02 ,  H04W28/14 ,  H04L12/825 ,  H04L12/835

CPC classification number: H04W28/0236 ,  H04L47/263 ,  H04L47/30 ,  H04W28/14 ,  Y02D50/10

Abstract: Methods, apparatus, and computer readable media determine a transmission rate. In some aspects, a method includes determining, via an electronic device, an amount of data buffered in a network, determining a sustainable throughput of the network; and determining a transmission rate based at least in part on the sustainable throughput and the amount of data buffered.

Abstract translation: 方法，装置和计算机可读介质确定传输速率。 在一些方面，一种方法包括经由电子设备确定在网络中缓冲的数据量，确定网络的可持续吞吐量; 以及至少部分地基于可持续吞吐量和缓冲的数据量来确定传输速率。

公开(公告)号：US20140071819A1

公开(公告)日：2014-03-13

申请号：US13974906

申请日：2013-08-23

Applicant: QUALCOMM Incorporated

Inventor： Rahul Gopalan ,  Hyukjune Chung ,  Prasanjit Panda

IPC: H04W28/02

CPC classification number: H04W28/0236 ,  H04L47/263 ,  H04L47/30 ,  H04W28/14 ,  Y02D50/10

Abstract: Methods, apparatus, and computer readable media determine a transmission rate. In some aspects, a method includes determining, via an electronic device, an amount of data buffered in a network, determining a sustainable throughput of the network; and determining a transmission rate based at least in part on the sustainable throughput and the amount of data buffered.

Abstract translation: 方法，装置和计算机可读介质确定传输速率。 在一些方面，一种方法包括经由电子设备确定在网络中缓冲的数据量，确定网络的可持续吞吐量; 以及至少部分地基于可持续吞吐量和缓冲的数据量来确定传输速率。

公开(公告)号：US20140056162A1

公开(公告)日：2014-02-27

申请号：US13973885

申请日：2013-08-22

Applicant: Qualcomm Incorporated

Inventor： Rahul Gopalan ,  Hyukjune Chung ,  Prasanjit Panda

IPC: H04L12/26 ,  H04N7/26

CPC classification number: H04W28/10 ,  H04L43/0876 ,  H04L47/263 ,  H04L47/30 ,  H04L47/38 ,  H04N19/115 ,  H04N19/164 ,  H04N19/166 ,  H04N19/17 ,  H04N21/2343 ,  H04N21/23805 ,  H04N21/2662 ,  H04N21/44209 ,  H04N21/6373 ,  H04N21/6582 ,  H04W8/00

Abstract: Methods, apparatus, and computer readable media may adjust an encoding rate based on network conditions between a transmitter and a receiver. Either the transmitter, receiver, or both the transmitter and receiver may determine the encoding rate. In one aspect, a ratio of received network data to transmitted network data is determined. An encoding parameter is then determined based on the determined ratio. In one aspect, the encoding parameter may be used to adjust an encoder. In another aspect, the determined encoding parameter may be transmitted to an encoding or transmitting node. In another aspect, an amount of data buffered in a network is determined. A sustainable throughput of the network is also determined. A transmission rate is then determined based on the sustainable throughput and the amount of data buffered. An encoding parameter is then adjusted based on the transmission rate.

公开(公告)号：US10063861B2

公开(公告)日：2018-08-28

申请号：US15131574

申请日：2016-04-18

Applicant: QUALCOMM Incorporated

Inventor： Ying Chen ,  Xuerui Zhang ,  Mayank Tiwari ,  Ning Bi ,  Prasanjit Panda

IPC: H04N19/00 ,  H04N19/159 ,  H04N19/58 ,  H04N19/105 ,  H04N19/172 ,  H04N19/169

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/162 ,  H04N19/172 ,  H04N19/176 ,  H04N19/188 ,  H04N19/46 ,  H04N19/58 ,  H04N19/70

Abstract: Techniques and systems are provided for performing predictive random access using a background picture. For example, a method of decoding video data includes obtaining an encoded video bitstream comprising a plurality of pictures. The plurality of pictures include a plurality of predictive random access pictures. A predictive random access picture is at least partially encoded using inter-prediction based on at least one background picture. The method further includes determining, for a time instance of the video bitstream, a predictive random access picture of the plurality of predictive random access pictures with a time stamp closest in time to the time instance. The method further includes determining a background picture associated with the predictive random access picture, and decoding at least a portion of the predictive random access picture using inter-prediction based on the background picture.

公开(公告)号：US20160234496A1

公开(公告)日：2016-08-11

申请号：US14864527

申请日：2015-09-24

Applicant: QUALCOMM Incorporated

Inventor： Prasanjit Panda ,  Narendranath Malayath ,  Anush Krishna Moorthy ,  Mayank Tiwari

IPC: H04N19/124 ,  H04N19/40 ,  H04N19/44 ,  H04N19/85 ,  H04N19/426

CPC classification number: H04N19/124 ,  H04N19/14 ,  H04N19/172 ,  H04N19/40 ,  H04N19/428 ,  H04N19/44 ,  H04N19/85

Abstract: Techniques are described for performing near visually lossless video recompression. The disclosed techniques generate video frames having relatively small bitrates and relatively small file sizes while retaining approximately a same level of visually perceivable video quality as the originally recorded video frames. In general, recompression of a video frame takes an input video frame and produces a second copy of the video frame that has the same or lower Nitrate. The proposed techniques address the problem of recompressing a video frame with no perceivable loss in visual quality (i.e., visually lossless recompression) compared to the original recording of the video frame. In addition, the disclosed techniques provide one-step recompression of video frames that includes a single decoding and encoding of each video frame.

Abstract translation: 描述了用于执行近视觉无损视频再压缩的技术。 所公开的技术产生具有相对小的比特率和相对小的文件大小的视频帧，同时保持与原始记录的视频帧大致相同的视觉上可感知的视频质量水平。 通常，视频帧的重新压缩采用输入视频帧，并产生具有相同或更低硝酸盐的视频帧的第二副本。 所提出的技术解决了与视频帧的原始记录相比，视频质量（即视觉无损重新压缩）没有可察觉的损失来再压缩视频帧的问题。 此外，所公开的技术提供包括每个视频帧的单个解码和编码的视频帧的一步重新压缩。

公开(公告)号：US20180332281A1

公开(公告)日：2018-11-15

申请号：US15977590

申请日：2018-05-11

Applicant: QUALCOMM Incorporated

Inventor： Yang Yu ,  In Suk Chong ,  Xianglin Wang ,  Prasanjit Panda ,  Mayank Tiwari ,  Marta Karczewicz ,  Shashidhar Jangili

IPC: H04N19/107 ,  H04N19/124 ,  H04N19/177 ,  H04N19/91 ,  H04N19/176

CPC classification number: H04N19/107 ,  H04N19/124 ,  H04N19/176 ,  H04N19/177 ,  H04N19/91

Abstract: This disclosure describes techniques for achieve high coding efficiency by periodically encoding anchor frames with a lower Quantization Parameter (QP) to provide better prediction for the following frames. Techniques include adaptively deciding which frames are encoded with lower QP by use of the collected encoding statistics via an encoding scheme with or without rate control.

公开(公告)号：US10051519B2

公开(公告)日：2018-08-14

申请号：US13973907

申请日：2013-08-22

Applicant: QUALCOMM Incorporated

Inventor： Rahul Gopalan ,  Hyukjune Chung ,  Prasanjit Panda

IPC: G06F15/16 ,  H04W28/10 ,  H04L12/26 ,  H04W8/00 ,  H04L12/811 ,  H04L12/825 ,  H04L12/835 ,  H04N21/2343 ,  H04N21/238 ,  H04N21/2662 ,  H04N21/442 ,  H04N21/6373 ,  H04N21/658 ,  H04N19/115 ,  H04N19/164 ,  H04N19/166 ,  H04N19/17

Abstract: Methods, apparatus, and computer readable media may adjust an encoding rate based on network conditions between a transmitter and a receiver. Either the transmitter, receiver, or both the transmitter and receiver may determine the encoding rate. In one aspect, a ratio of received network data to transmitted network data is determined. An encoding parameter is then determined based on the determined ratio. In one aspect, the encoding parameter may be used to adjust an encoder. In another aspect, the determined encoding parameter may be transmitted to an encoding or transmitting node. In another aspect, an amount of data buffered in a network is determined. A sustainable throughput of the network is also determined. A transmission rate is then determined based on the sustainable throughput and the amount of data buffered. An encoding parameter is then adjusted based on the transmission rate.

公开(公告)号：US20170105005A1

公开(公告)日：2017-04-13

申请号：US15131574

申请日：2016-04-18

Applicant: QUALCOMM Incorporated

Inventor： Ying Chen ,  Xuerui Zhang ,  Mayank Tiwari ,  Ning Bi ,  Prasanjit Panda

IPC: H04N19/159 ,  H04N19/169 ,  H04N19/172 ,  H04N19/58 ,  H04N19/105

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/162 ,  H04N19/172 ,  H04N19/176 ,  H04N19/188 ,  H04N19/46 ,  H04N19/58 ,  H04N19/70

Abstract: Techniques and systems are provided for performing predictive random access using a background picture. For example, a method of decoding video data includes obtaining an encoded video bitstream comprising a plurality of pictures. The plurality of pictures include a plurality of predictive random access pictures. A predictive random access picture is at least partially encoded using inter-prediction based on at least one background picture. The method further includes determining, for a time instance of the video bitstream, a predictive random access picture of the plurality of predictive random access pictures with a time stamp closest in time to the time instance. The method further includes determining a background picture associated with the predictive random access picture, and decoding at least a portion of the predictive random access picture using inter-prediction based on the background picture.

公开(公告)号：US09456383B2

公开(公告)日：2016-09-27

申请号：US13973885

申请日：2013-08-22

Applicant: QUALCOMM Incorporated

Inventor： Rahul Gopalan ,  Hyukjune Chung ,  Prasanjit Panda

IPC: H04L12/26 ,  H04N7/26 ,  H04W28/10 ,  H04W8/00 ,  H04L12/811 ,  H04L12/825 ,  H04L12/835 ,  H04N21/2343 ,  H04N21/238 ,  H04N21/2662 ,  H04N21/442 ,  H04N21/6373 ,  H04N21/658 ,  H04N19/115 ,  H04N19/164 ,  H04N19/166 ,  H04N19/17

CPC classification number: H04W28/10 ,  H04L43/0876 ,  H04L47/263 ,  H04L47/30 ,  H04L47/38 ,  H04N19/115 ,  H04N19/164 ,  H04N19/166 ,  H04N19/17 ,  H04N21/2343 ,  H04N21/23805 ,  H04N21/2662 ,  H04N21/44209 ,  H04N21/6373 ,  H04N21/6582 ,  H04W8/00

Abstract: Methods, apparatus, and computer readable media may adjust an encoding rate based on network conditions between a transmitter and a receiver. Either the transmitter, receiver, or both the transmitter and receiver may determine the encoding rate. In one aspect, a ratio of received network data to transmitted network data is determined. An encoding parameter is then determined based on the determined ratio. In one aspect, the encoding parameter may be used to adjust an encoder. In another aspect, the determined encoding parameter may be transmitted to an encoding or transmitting node. In another aspect, an amount of data buffered in a network is determined. A sustainable throughput of the network is also determined. A transmission rate is then determined based on the sustainable throughput and the amount of data buffered. An encoding parameter is then adjusted based on the transmission rate.

Abstract translation: 方法，装置和计算机可读介质可以基于发射机和接收机之间的网络条件来调整编码速率。 发射机，接收机或发射机和接收机两者都可以确定编码速率。 一方面，确定接收的网络数据与传输的网络数据的比率。 然后基于所确定的比率来确定编码参数。 在一个方面，编码参数可用于调整编码器。 在另一方面，所确定的编码参数可以被发送到编码或发送节点。 在另一方面，确定在网络中缓冲的数据量。 网络的可持续吞吐量也被确定。 然后基于可持续吞吐量和缓冲的数据量来确定传输速率。 然后根据传输速率调整编码参数。